INTRODUCTION TO SIMPLE HARMONIC MOTION
What do you think it means?
SHO Simple (one restoring force) proportional to displacement from equilibrium…. Harmonic (periodic, repeats)
Motion is like a wave……. Repeats over one : period, cycle, wave, revolution, swing, back and forth, up and down, etc…
AMPLITUDE Height or Strength of wave. Distance/Angle from equilibrium to maximum. Like height of water wave, angle of swing on pendulum, loudness of sound, brightness of light.
EQUILIBRIUM Rest point
PERIOD Time per cycle (wave, swing, revolution, etc…)
T = sec/wave
FREQUENCY Cycles per time, f = 1/T waves/sec… Hertz
Hooke’s Law F = k X , F is the restoring force and x is the displacement from rest. Applies to all SHM not just springs.
Spring Constant k = F/x = Force/Distance…. N/m k is the spring constant that is dependent on the tightness, makeup of the spring.